[llvm] [LV][NFC] Improve readability with `bool` instead of `auto` (PR #111532)

[Florian Hahn via llvm-commits]

================
@@ -3698,7 +3697,7 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
 
     // Determine if all users of the induction variable are uniform after
     // vectorization.
-    auto UniformInd = llvm::all_of(Ind->users(), [&](User *U) -> bool {
+    bool UniformInd = llvm::all_of(Ind->users(), [&](User *U) -> bool {
----------------
fhahn wrote:

while you are editing the line, might as well drop redundant llvm::


```suggestion
    bool UniformInd = all_of(Ind->users(), [&](User *U) -> bool {
```

https://github.com/llvm/llvm-project/pull/111532